On the Mailbag, Gill Gross starts with some recent takeaways from Rafael Jodar's debut title, Stefanos Tsitsipas's Monte Carlo crash out and Valentin Vacherot's consistency. Then your comments, including: has Jannik Sinner's baseline game declined, who has the ATP's best 2nd serves, how does clay change pro tennis, can Lorenzo Musetti still finish No. 3, what exactly does "tennis IQ" mean, and more!